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Beginning Database Design Solutions (Wrox Programmer to Programmer)

\r Description \rBeginning Database Design Solutions (Wrox Programmer to Programmer) ebookThis book is intended for IT professionals and students who want to learn how to design, analyze and understand databases. The material will benefit those who want better high-level understanding of databases such as the proposal managers, architects, project managers, and even customers. The material will also benefit those who will actually design, build and work with databases such as database designers, database administrators and programmers. In many projects, these roles overlap so the same person may be responsible for working on the proposal, the management part of the project, and designing and creating the database.

This book is aimed at IT professionals and students of all experience levels. It does not require that you have previous experience of databases or applications that use them. It does not even believe that you have experience with computers. All you need is a willingness and desire to learn.

book explains database design. It tells how to plan a database structure so that the database will be robust, resilient to errors, and flexible enough to accommodate a reasonable amount of future changes. It explains how to detect database requirements, build data models to study the data needs, and refine these models to improve the effectiveness of the database.

book solidify these concepts by working through a detailed example to design a realistic database. Subsequent chapters explain how to actually build databases using two common database products: Access 2007 and MySQL.

The book concludes by describing some of the topics you need to understand that keeping a database that runs efficiently, such as database maintenance and security.

book explains database design. It tells how to determine what should go into a database and the database should be designed to give the best results.

this book does not focus on much create database. The details of database construction is different for different database tools so, to remain as general as useful as possible, not this book does not focus on any particular database system. You can use the techniques described here in the same way regardless of database tools to use if it is Access, SQL Server, Oracle, MySQL or another database.

most database products include free publications that you can use for small projects. For example, SQL Server Express Edition, Oracle Express Edition, and MySQL Community Server is all free. Fri remain neutral database, making the book does not assume that you are using a particular database so that you do not need any special software or hardware. Working through the exercises, all you really need a pen and some paper. You are welcome to write solutions to your computer if you want but you can actually find work with pencil and paper easier than using a graphical design tool to draw pictures, at least until you are comfortable with database design and is ready to pick a computerized design tool .

“Aim for efficient database design, explains the reasons why people and organizations use databases. It explains a database’s purpose and that it must meet to be useful. This also describes the fundamental acid (Atomicity, consistency, isolation, durability) and CRUD (create, read, update, delete) features that any good database should have. This explains the high level generally what makes a good database and what makes a bad database .

“Database Types”, explains some of the different types of databases that you may choose to use. These include flat files, spreadsheets, databases, hierarchical (XML), databases, objects and relational databases. The relational database is one of the most powerful and most widely used forms of the database so it is the focus of this book, but it is important to realize that there are alternatives that may be more appropriate in some circumstances. This gives some tips on determining which type of database can be best for a given project.

“Relational Database Fundamentals”, explains basic relational database concepts such as tables, rows and columns. This explains the common use of relational terms in addition to the more technical terms, sometimes used by database theorists. It describes different types of restrictions that databases use to ensure that data is stored securely and consistently.

“Understanding users ‘needs,” explains how to learn about the needs of users and gather user requirements. It tells how to study users’ current activities , existing databases (if any), and desired improvements. It describes the common questions you can ask to learn about users’ activities, aspirations and needs and how to build results in the requirements documents and specifications. This explains what the use cases and explains how to use them and to guide the database design and to measure success.

“translate user requirements in data models,” introduces the data modeling. It explains how to translate the user’s conceptual model and the requirements of other, more precise models that define the database design strictly. It describes various methods of database modeling, including user interface models, semantic models, object, entity-relationship diagrams and relational models.

“Extracting Business Rules”, explains how a database can manage business rules. It explains what business rules are, how they differ from the requirements database structure and how to identify business rules. This explains the benefits of separating business rules from the database structure and explains how to achieve this separation.

“Normalizing data”, explains one of the greatest tools in database design: normalization . Normalization technology gives you the opportunity to restructure a database to increase its flexibility and make it more robust. This explains the different forms of normalization, emphasizes the stages are the most common and most important: first, second and third normal form (1NF, 2NF, and 3NF). It explains how each of these types of normalization helps to prevent errors and explains why it’s sometimes better to leave a database no less normalized to improve performance.

“Designing Databases to support programs, “explains how the database fits into the larger context of application design and lifecycle. This explains the recent development due to the underlying database design. It discusses multi-tier architectures that can help decouple the application and database design so it can at least some changes in either without require changes to the other.

“Common Design Patterns,” explains some common patterns that are useful in many applications. Some of these techniques is to perform various types of relationships between objects, store the hierarchical and network data, registration temporal data, and logging and locking.

“common design pitfalls”, explains some common design mistakes that occur in the development of databases. It describes the problems that may arise from inadequate planning, poor normalization, and obsession with ID and performance.

“user needs and requirements,” goes through the steps necessary to analyze the users’ problems, defining requirements and creating use cases. It describes the fictitious interviews with customers who are used to identify the needs and translate them into the database requirements.

“To build a data model,” translate the requirements gathered earlier in a series of computer models that accurately defines the structure of the database. This is based UI models, entity-relationship diagrams, semantic object models and relational models to refine the original design database. The final relational models match the structure of a relational database rather close, so they are easy to implement.

“Extracting Business Rules”, identifies the business rules embedded in the relational model. It shows how to extract these rules to separate them logically from the structure of the database. This makes the database more robust to future changes in business rules.

“Normalization and processing,” refines the relational model by normalizing it. It goes through several versions of the database that are in various normal forms. The select the degree of normalization, which gives a reasonable balance between robustness and acceptable performance.

: Microsoft Access, explains how to build a database with Microsoft Access 2007. That explains enough to get started and use Access to build non-trivial databases. You can use other versions of Access to work through this, including the locations of menus, buttons and other Access features are different in different versions.

“MySQL”, explains how to build a database with MySQL. This tells you where to download a free version of MySQL. It explains how to use MySQL Command Line Client as well as some useful graphical tools, including MySQL Query Browser and MySQL Workbench.

“Introduction to SQL,” provides an introduction to SQL (Structured Query Language). It explains how to use SQL commands to add, insert, update and delete data. By using SQL, you can help isolate an application from the idiosyncrasies of the particular database product, which it uses to store data.

“Building databases with SQL scripts,” explains how to use SQL scripts to build a database. It explains the benefits of this technology, such as the ability to create scripts to initialize a database before performing the tests. It also explains some of the restrictions on this method, such as the fact that the user must create and …\r Beginning Database Design Solutions (Wrox Programmer to Programmer) ebook

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